void IHttpCwsHandler.ProcessRequest(HttpCwsContext context)
{
try
{
if (context.Request.RouteData == null)
{
return;
}
else
{
string action = context.Request.HttpMethod + context.Request.RouteData.Route.Name.ToUpper();
switch (action)
{
case "GETVARIABLES":
context.Response.ContentType = "application/json";
context.Response.Write(MvMain.getMagicVariablesSerialized(), true);
break;
}
}
}
catch (Exception ex)
{
context.Response.ContentType = "text/html";
context.Response.StatusCode = 500;
context.Response.Write("<HTML><HEAD>ERROR</HEAD><BODY>Internal server error</BODY></HEAD></HTML>", true);
}
}
/// <summary>
/// Send an HTTP error response by specifying the status code and message.
/// In the case of a 405 response, the caller should also include the allowed
/// HTTP methods for the requested resource
/// </summary>
/// <param name="context"></param>
/// <param name="code"></param>
/// <param name="errorMsg"></param>
/// <param name="allowedMethods"></param>
void SendError(HttpCwsContext context, int code, string errorMsg, params string[] allowedMethods)
{
context.Response.StatusCode = code;
context.Response.StatusDescription = statusDescriptions[code];
if (code == 405)
{
string allowHeader = "";
// Add each allowed method in a comma-separated list
for (int i = 0; i < allowedMethods.Length; i++)
{
allowHeader += allowedMethods[i].ToUpper();
if (i != allowedMethods.Length - 1)
{
allowHeader += ", ";
}
}
// Add the finished header to the HTTP response and to the response body
context.Response.AppendHeader("Allow", allowHeader);
}
// Send the error response
context.Response.ContentType = "text/html";
context.Response.Write(CreateHtmlBody(errorHtml,
new NameValueCollection()
{
{ "error", errorMsg }
}),
true);
}
/// <summary>
/// Provides processing of HTTP requests by a HttpHandler that implements
/// the <see cref="T:Crestron.SimplSharp.WebScripting.IHttpCwsHandler"/> interface.
/// </summary>
/// <param name="context">The object encapsulating the HTTP request.</param>
/// <returns>
/// true is the request was processed successfully; otherwise, false.
/// </returns>
public virtual void ProcessRequest(HttpCwsContext context)
{
try
{
_context = context;
switch (_context.Request.HttpMethod)
{
case "GET":
try
{
Get();
}
catch (Exception e)
{
if (e is NotImplementedException)
{
Error(405, "Method not allowed");
}
else
{
Error(e);
}
}
break;
case "POST":
try
{
Post();
}
catch (Exception e)
{
if (e is NotImplementedException)
{
Error(405, "Method not allowed");
}
else
{
Error(e);
}
}
break;
default:
Error(405, "Method not allowed");
break;
}
if (Response.IsClientConnected)
{
Response.Write("", true);
}
}
catch (Exception e)
{
Error(e);
}
}
protected virtual void HandleError(HttpCwsContext context, int statusCode, string status, string customMessage)
{
context.Response.Clear();
context.Response.ClearHeaders();
context.Response.StatusCode = statusCode;
context.Response.StatusDescription = status;
var content = string.Format("<H1>Error {0} <span>{1}</span></H1><P>{2}</P>",
statusCode, status, customMessage);
context.Response.Write(content, true);
}
/// <summary>
/// Processes the CWS request.
/// </summary>
/// <param name="context">The context of the request.</param>
void IHttpCwsHandler.ProcessRequest(HttpCwsContext context)
{
switch (context.Request.HttpMethod.ToUpper())
{
case "GET":
ProcessGet(context);
break;
default:
break;
}
}
void IHttpCwsHandler.ProcessRequest(HttpCwsContext context)
{
try
{
context.Response.ContentType = "application/json";
context.Response.AppendHeader("Access-Control-Allow-Origin", "*");
context.Response.AppendHeader("Access-Control-Allow-Headers", "Content-Type");
context.Response.AppendHeader("Access-Control-Allow-Methods", "GET, PUT, POST");
//CrestronConsole.PrintLine("HttpMethod: " + context.Request.HttpMethod);
//CrestronConsole.PrintLine("HttpPath: " + context.Request.Path);
//CrestronConsole.PrintLine("Httpname: " + context.Request.RouteData.Route.Name);
if (context.Request.Path.ToUpper() == "/CWS/API/" + this.slotNumber + "/CONFIGURATION/")
{
context.Response.StatusCode = 200;
switch (context.Request.HttpMethod)
{
case ("GET"):
Configuration.Reader();
context.Response.Write(JsonConvert.SerializeObject(Configuration.Obj), true);
break;
case ("PUT"):
string JsonString;
StreamReader TheFile = new StreamReader(context.Request.InputStream);
JsonString = TheFile.ReadToEnd();
TheFile.Close();
//CrestronConsole.PrintLine("JsonString: " + JsonString);
Configuration.Obj = JsonConvert.DeserializeObject <RootObject>(JsonString);
Configuration.Writer();
context.Response.StatusCode = 204;
context.Response.Write(JsonConvert.SerializeObject(Configuration.Obj), true);
break;
default:
context.Response.StatusCode = 200;
context.Response.Write(JsonConvert.SerializeObject(GetApiHelp()), true);
break;
}
}
else
{
context.Response.StatusCode = 200;
context.Response.Write(JsonConvert.SerializeObject(GetApiHelp()), true);
}
}
catch (Exception ex)
{
context.Response.ContentType = "text/html";
context.Response.StatusCode = 401;
context.Response.Write(_Server.HtmlEncode(String.Format("<HTML><HEAD>ERROR</HEAD><BODY>The following error occurred: {0}. Stacktrace: {1}</BODY></HEAD></HTML>", ex.Message, ex.StackTrace)), true);
}
}
public override void ProcessRequest(HttpCwsContext context)
{
string resourceUrl = "";
int rlyID;
try
{
resourceUrl = GetResourceUrl(context);
rlyID = int.Parse((string)context.Request.RouteData.Values["id"]);
}
catch (Exception e)
{
CrestronConsole.PrintLine("Error while parsing {id} of individual relay from URL: " + e.Message);
RespondWithJsonError(context, 404, "Not Found", resourceUrl, "The requested Relay ID does not parse as an integer");
return;
}
try
{
string subID = context.Request.RouteData.Values["subid"].ToString();
if (server.sublists[rlyID].ContainsKey(subID))
{
if (context.Request.HttpMethod == "DELETE")
{
// remove the internal subscription resource
server.sublists[rlyID].Remove(subID);
CrestronConsole.PrintLine("subscription " + subID + " has been deleted by " + context.Request.UserHostAddress);
// send the response
context.Response.StatusCode = 204;
context.Response.StatusDescription = "No Content";
context.Response.End();
}
else
{
RespondWithJsonError(context, 405, "Method Not Allowed", resourceUrl, "allowed methods: " + allowedMethods);
}
}
else
{
RespondWithJsonError(context, 404, "Not Found", resourceUrl, null);
}
}
catch (Exception e)
{
CrestronConsole.PrintLine("Could not process request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
finally
{
CrestronConsole.PrintLine("Served response for " + context.Request.Url.AbsolutePath);
}
}
// Write a Collection+JSON error message to the client. Put a non-empty string in msg to provide a specific
// error description.
public void RespondWithJsonError(HttpCwsContext context, int code, string title, string resourceUrl, string msg)
{
try
{
context.Response.StatusCode = code;
context.Response.StatusDescription = title;
context.Response.ContentType = "application/vnd.collection+json";
if (code == 405)
{
context.Response.AppendHeader("Allow", allowedMethods);
}
// Since the client is expecting a Collection+JSON response, send the "error" object
// detailing the error
JObject err = new JObject
{
{
"collection", new JObject
{
{ "version", "1.0" },
{ "href", resourceUrl },
{
"error", new JObject
{
{ "title", title },
{ "code", code }
}
}
}
}
};
// Optionally include a specific error message to the client. Automated clients
// would be able to print this message in an error log, for example
if (msg != null && msg != "")
{
err["collection"]["error"]["message"] = msg;
}
string json = JsonConvert.SerializeObject(err);
context.Response.Write(json, true);
}
catch (Exception e)
{
CrestronConsole.PrintLine("Exception in RespondWithJsonError: " + e.Message);
}
finally
{
CrestronConsole.PrintLine("Served a Collection+JSON error resposne");
}
}
public override void ProcessRequest(HttpCwsContext context)
{
string resourceUrl = "";
try
{
resourceUrl = GetResourceUrl(context);
RespondWithJsonError(context, 404, "Not Found", resourceUrl, "Requested resource does not exist");
}
catch (Exception e)
{
CrestronConsole.PrintLine("Error in DefaultHandler: " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
}
public void ProcessRequest(HttpCwsContext context)
{
var method = context.Request.HttpMethod;
switch (method)
{
case "GET":
context.Response.StatusCode = 200; // OK
context.Response.ContentType = "application/json";
var temp = new Dictionary <string, string>();
if (context.Request.RouteData.Values.ContainsKey("NAME"))
{
temp["name"] = context.Request.RouteData.Values["NAME"].ToString();
context.Response.Write(JsonConvert.SerializeObject(temp), true);
}
else
{
temp["name"] = _name;
context.Response.Write(JsonConvert.SerializeObject(temp), true);
}
break;
case "PUT":
context.Response.StatusCode = 200; // OK
context.Response.ContentType = "application/json";
using (var reader = new StreamReader(context.Request.InputStream))
{
var obj = JsonConvert.DeserializeObject <Dictionary <string, string> >(reader.ReadToEnd());
if (obj.ContainsKey("name"))
{
_name = obj["name"];
context.Response.Write("{ \"status\": \"OK\" }", true);
}
}
break;
default:
context.Response.StatusCode = 501; // Not implemented
context.Response.Write(
String.Format("{0} method not implemented!", method), true);
break;
}
}
public override void ProcessRequest(HttpCwsContext context)
{
string resourceUrl = "";
try
{
resourceUrl = GetResourceUrl(context);
if (context.Request.HttpMethod == "GET" || context.Request.HttpMethod == "HEAD") // HTTP methods are case-sensitive
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.Response.AppendHeader("Content-Type", "application/vnd.collection+json");
context.Response.AppendHeader("Link", resourceUrl + "/web-hooks" + ", rel=\"Subscriptions\""); // requirement of RESTful WebHooks standard
if (context.Request.HttpMethod == "GET") // add the body for the GET request
{
// return the Collection+JSON representation of the Relay list
// Populate template.json with the Collection+JSON response.
// This response will not include the "template" property, since
// clients may not PUT or POST to the relay collection itself
string template = String.Copy(server.CjTemplate);
template = template.Replace("{@resource}", resourceUrl);
template = template.Replace("{@list}", FormatCollection(server.Relays, resourceUrl));
template = template.Replace("{@includetemplate}", "");
template = template.Replace("{@template}", "");
context.Response.Write(template, false); // write the populated template as a response
}
context.Response.End();
}
else
{
RespondWithJsonError(context, 405, "Method Not Allowed", resourceUrl, allowedMethods);
}
}
catch (Exception e)
{
CrestronConsole.PrintLine("Could not process request to " +
context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
finally
{
CrestronConsole.PrintLine("Served response for " + context.Request.Url.AbsolutePath);
}
}
// Return a string representing the URL of the requested resource with no trailing
// The returned URL won't end in a '/'
public string GetResourceUrl(HttpCwsContext context)
{
// Constructing the URL from the HTTP request object avoids hard-coding the protocol (http/https)
// into the URL, and it allows one to change the route name without breaking the code
string resourceUrl = context.Request.Url.Scheme + "://"
+ context.Request.Url.Authority
+ context.Request.Url.AbsolutePath;
// remove trailing '/'s if present
resourceUrl = resourceUrl.TrimEnd('/');
//while (resourceUrl.EndsWith("/"))
//{
// resourceUrl = resourceUrl.Substring(0, resourceUrl.Length - 1);
//}
return(resourceUrl);
}
protected sealed override void HandleError(HttpCwsContext context, int statusCode, string status, string customMessage)
{
context.Response.Clear();
context.Response.ClearHeaders();
context.Response.ContentType = "application/json";
context.Response.StatusCode = statusCode;
context.Response.StatusDescription = status;
var error = new
{
statusCode,
status,
message = customMessage
};
var data = JObject.FromObject(error);
context.Response.Write(data.ToString(Formatting.Indented), true);
}
public override void ProcessRequest(HttpCwsContext context)
{
string resourceUrl = "";
try
{
resourceUrl = GetResourceUrl(context);
string subID = context.Request.RouteData.Values["subid"].ToString();
if (server.sublists[COLLECTION_SUBLIST].ContainsKey(subID))
{
if (context.Request.HttpMethod == "DELETE")
{
// remove the internal subscription resource
server.sublists[COLLECTION_SUBLIST].Remove(subID);
CrestronConsole.PrintLine("subscription " + subID + " has been deleted by " + context.Request.UserHostAddress);
// send the response
context.Response.StatusCode = 204;
context.Response.StatusDescription = "No Content";
context.Response.End();
}
else
{
RespondWithJsonError(context, 405, "Method Not Allowed", resourceUrl, "allowed methods: " + allowedMethods);
}
}
else
{
RespondWithJsonError(context, 404, "Not Found", resourceUrl, null);
}
}
catch (Exception e)
{
CrestronConsole.PrintLine("Could not process request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
finally
{
CrestronConsole.PrintLine("Served response for " + context.Request.Url.AbsolutePath);
}
}
/// <summary>
/// Processes a GET request.
/// </summary>
/// <param name="context">The context of the request.</param>
private void ProcessGet(HttpCwsContext context)
{
Debug.WriteLine("Processing GET.");
try
{
var html = string.Empty;
var css = string.Empty;
using (var stream = Crestron.SimplSharp.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("Evands.Pellucid.Resources.CwsConsoleTemplate.html"))
{
using (var reader = new Crestron.SimplSharp.CrestronIO.StreamReader(stream, true))
{
html = reader.ReadToEnd();
}
}
using (var stream = Crestron.SimplSharp.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("Evands.Pellucid.Resources.default.css"))
{
using (var reader = new Crestron.SimplSharp.CrestronIO.StreamReader(stream, true))
{
css = reader.ReadToEnd();
}
}
context.Response.StatusCode = 200;
var host = context.Request.Url.Host;
var protocol = useSecureWebsocket ? "wss://" : "ws://";
html = html.Replace("{{ CSS }}", css).Replace("{{ PROTOCOL }}", protocol).Replace("{{ PORT }}", socketPort).Replace("{{ HOST }}", host);
context.Response.Write(html, true);
}
catch (Exception ex)
{
Debug.WriteException(this, ex, "Exception while processing GET.");
context.Response.StatusCode = 500;
context.Response.StatusDescription = string.Format("Internal Server Error - Exception encountered while retrieving Console Endpoint.<br/><br/>{0}", ex.ToString());
context.Response.Write(context.Response.StatusDescription, true);
}
}
void IHttpCwsHandler.ProcessRequest(HttpCwsContext context)
{
try
{
// handle requests
if (context.Request.RouteData != null)
{
switch (context.Request.RouteData.Route.Name.ToUpper())
{
case "ROOMNAME":
context.Response.StatusCode = 200;
context.Response.Write(InitialParametersClass.RoomName, true);
break;
default:
break;
}
}
}
catch (Exception e)
{
ErrorLog.Error("CWS Handler: {0}", e.Message);
}
}
public override void ProcessRequest(HttpCwsContext context)
{
uint rlyID;
string resourceUrl = "";
try
{
resourceUrl = GetResourceUrl(context);
rlyID = uint.Parse((string)context.Request.RouteData.Values["id"]);
}
catch (Exception e)
{
CrestronConsole.PrintLine("Error while parsing {id} of individual relay from URL: " + e.Message);
RespondWithJsonError(context, 404, "Not Found", resourceUrl, "The requested Relay ID does not parse as an integer");
return;
}
try
{
if (rlyID >= 1 && rlyID <= server.NumberOfRelays)
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK"; // server will respond with 200 OK for a successful GET, HEAD, or PUT
if (context.Request.HttpMethod == "GET" || context.Request.HttpMethod == "HEAD")
{
// add method-specific response headers
context.Response.AppendHeader("Content-Type", "application/vnd.collection+json");
context.Response.AppendHeader("Link", resourceUrl + "/web-hooks" + ", rel=\"Subscriptions\""); // requirement of RESTful WebHooks standard
if (context.Request.HttpMethod == "GET") // add the body for the GET request
{
// return the Collection+JSON representation of the individual Relay
// Populate template.json with the Collection+JSON response.
// This response will include the "template" property, since
// clients may PUT to the relay to update its state
string template = String.Copy(server.CjTemplate);
template = template.Replace("{@resource}", resourceUrl);
template = template.Replace("{@list}", FormatItem(server.Relays[rlyID], resourceUrl));
template = template.Replace("{@includetemplate}", ", \"template\": ");
template = template.Replace("{@template}", templateString);
context.Response.Write(template, false); // write the populated template as a response
}
context.Response.End();
}
else if (context.Request.HttpMethod == "PUT")
{
if (context.Request.Headers.Get("Content-Type") == "application/vnd.collection+json")
{
string json;
using (StreamReader s = new StreamReader(context.Request.InputStream))
{
json = s.ReadToEnd();
}
JObject body = JsonConvert.DeserializeObject <JObject>(json);
if (body.IsValid(putRequestBodySchema))
{
string state = ((string)body["template"]["data"][0]["name"]).ToLower();
string newValue = ((string)body["template"]["data"][0]["value"]).ToLower();
if (state == "state" && (newValue == "close" || newValue == "open"))
{
// update internal Relay resource (true is Close, false is Open)
server.Relays[rlyID].State = (newValue == "close") ? true : false; // the collection itself is 0-based, but the ID in the URL is 1-based
// send the 200 OK response. No additional headers or entity-body is included in the
// PUT response, but other applications may return a representation of the updated
// resource
context.Response.End();
}
else
{
RespondWithJsonError(context, 400, "Bad Request", resourceUrl, "Bad name or value property in Collection+JSON template");
}
}
else
{
RespondWithJsonError(context, 400, "Bad Request", resourceUrl, "malformed Collection+JSON template provided");
}
}
else
{
RespondWithJsonError(context, 415, "Unsupported Media Type", resourceUrl, "supported media types: " + supportedMediaTypes);
}
}
else
{
RespondWithJsonError(context, 405, "Method Not Allowed", resourceUrl, "allowed methods: " + allowedMethods);
}
}
else
{
RespondWithJsonError(context, 404, "Not Found", resourceUrl, "The requested relay ID does not map to an available relay");
}
}
catch (Exception e)
{
CrestronConsole.PrintLine("Could not process request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
finally
{
CrestronConsole.PrintLine("Served response for " + context.Request.Url.AbsolutePath);
}
}
public void ProcessRequest(HttpCwsContext context)
{
try
{
// Only respond to POST requests made to the listen URL's path
if (parent.listenUrl.Path == context.Request.Url.AbsolutePath)
{
if (context.Request.HttpMethod == "POST")
{
// GET the individual relay to observe its updated state
HttpClientRequest req = new HttpClientRequest();
string linkString = context.Request.Headers["Link"];
// The notification POST request contains a link to the updated resource in the Link header.
// in compliance with the RESTful WebHooks standard at
// https://webhooks.pbworks.com/w/page/13385128/RESTful%20WebHooks
// This URL will be nested between the '<' and '>' characters,
// as described in https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Link
int startIndex = linkString.IndexOf('<') + 1;
int endIndex = linkString.IndexOf('>');
string linkUrlString = linkString.Substring(startIndex, endIndex - startIndex);
UrlParser relayUrl = new UrlParser(linkUrlString);
req.Url = relayUrl;
req.RequestType = RequestType.Get;
HttpHeader acceptHeader = new HttpHeader("Accept", "application/vnd.collection+json");
req.Header.AddHeader(acceptHeader);
req.FinalizeHeader();
HttpClientResponse res = parent.client.Dispatch(req);
int rlyID;
string newState = "";
if (res.Code == 200)
{
JObject item = JsonConvert.DeserializeObject <JObject>(res.ContentString);
rlyID = (int)item["collection"]["items"][0]["data"][0]["value"];
newState = (string)item["collection"]["items"][0]["data"][1]["value"];
}
else
{
CrestronConsole.PrintLine("Failed to get individual relay");
return;
}
// log the notification message to console
CrestronConsole.PrintLine("NOTIFICATION: Relay #" + rlyID + "'s state changed to " + newState);
// respond to notification with 200 OK
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.Response.End();
}
else
{
context.Response.StatusCode = 405;
context.Response.StatusDescription = "Method Not Allowed";
context.Response.End();
}
}
else // ignore all other URLs besides the listener URL
{
CrestronConsole.PrintLine("Sending back a 404");
context.Response.StatusCode = 404;
context.Response.StatusDescription = "Not Found";
context.Response.End();
}
}
catch (Exception e)
{
try
{
// Respond with error message
context.Response.StatusCode = 500;
context.Response.StatusDescription = "Internal Server Error";
context.Response.End();
CrestronConsole.PrintLine("Error in ProcessRequest: " + e.Message);
}
catch (Exception ex)
{
CrestronConsole.PrintLine("ProcessRequest unable to send error response: " + ex.Message);
}
}
finally
{
ErrorLog.Notice("Served response to " + context.Request.UserHostName);
}
}
public override void ProcessRequest(HttpCwsContext context)
{
// Example request/response:
// =>
// POST http://control-system/cws/api/relays/web-hooks
// Content-Type : text/uri-list
// Notification-Type : UPDATED
//
// http://www.webscripts.com/myaccount/mylistener
//
// <=
// 201 Created
// Location : http://control-system/cws/api/relays/web-hooks/46da87b3-7997-4ca1-8203-29ae68f01a6f
// Link : <http://control-system/cws/api/relays/web-hooks>, rel="Subscriptions"
string resourceUrl = "";
int rlyID;
try
{
resourceUrl = GetResourceUrl(context);
rlyID = int.Parse((string)context.Request.RouteData.Values["id"]);
}
catch (Exception e)
{
CrestronConsole.PrintLine("Error while parsing {id} of individual relay from URL: " + e.Message);
RespondWithJsonError(context, 404, "Not Found", resourceUrl, "The requested Relay ID does not parse as an integer");
return;
}
try
{
if (context.Request.HttpMethod == "POST")
{
if (context.Request.Headers.Get("Content-Type") == "text/uri-list")
{
string callbackUrl;
using (StreamReader s = new StreamReader(context.Request.InputStream))
{
callbackUrl = s.ReadLine(); // the first line of the request's entity body must be the callback URL
}
if (context.Request.Headers.Get("Notification-Type") == "UPDATED")
{
// Create an internal subscription resource. Subscription constructor will validate the URL
// remove "/web-hooks" so the subscription is linked to the individual relay resource itself, not the webhook
Subscription newSub = new Subscription(resourceUrl.Replace("/web-hooks", ""), callbackUrl, "UPDATED", server.notifier);
server.sublists[rlyID].Add(newSub.SubID.ToString(), newSub);
CrestronConsole.PrintLine("Created new subscription resource with ID: " + newSub.SubID);
// send response
context.Response.StatusCode = 201;
context.Response.StatusDescription = "Created";
context.Response.AppendHeader("Location", resourceUrl + "/" + newSub.SubID);
context.Response.AppendHeader("Link", "<" + resourceUrl + ">" + ", rel=\"Subscriptions\"");
context.Response.End();
}
// Other notification types include "ACCESSED," "CREATED," and "DELETED," but this
// server's WebHooks resources will not allow them
else
{
RespondWithJsonError(context, 400, "Bad Request", resourceUrl, "supported Notification-Types: UPDATED");
}
}
else
{
RespondWithJsonError(context, 415, "Unsupported Media Type", resourceUrl, "supported Content-Types: " + supportedMediaTypes);
}
}
else
{
RespondWithJsonError(context, 405, "Method Not Allowed", resourceUrl, "allowed methods: " + allowedMethods);
}
}
catch (System.UriFormatException e)
{
CrestronConsole.PrintLine("Malformed client request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 400, "Bad Request", resourceUrl, "Malformed URL provided in request body");
}
catch (System.ArgumentNullException e)
{
CrestronConsole.PrintLine("Malformed client request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 400, "Bad Request", resourceUrl, "No URL provided in request body");
}
catch (Exception e)
{
CrestronConsole.PrintLine("Could not process request to " + context.Request.Url.AbsolutePath + ": " + e.Message);
RespondWithJsonError(context, 500, "Internal Server Error", resourceUrl, null);
}
finally
{
CrestronConsole.PrintLine("Served response for " + context.Request.Url.AbsolutePath);
}
}
/// <summary>
/// Provides processing of HTTP requests by a HttpHandler that implements
/// the <see cref="T:Crestron.SimplSharp.WebScripting.IHttpCwsHandler"/> interface.
/// </summary>
/// <param name="context">The object encapsulating the HTTP request.</param>
/// <returns>
/// true is the request was processed successfully; otherwise, false.
/// </returns>
public override void ProcessRequest(HttpCwsContext context)
{
context.Response.ContentType = "application/json";
base.ProcessRequest(context);
}
public void ProcessRequest(HttpCwsContext context)
{
try
{
Uri requestUri = context.Request.Url;
string method = context.Request.HttpMethod;
string path = context.Request.Path.ToLower();
switch (path)
{
case "/cws/":
if (method == "GET" || method == "HEAD")
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.Response.ContentType = "text/html";
// include the body for the GET request, but not HEAD
if (method == "GET")
{
context.Response.Write(CreateHtmlBody(startHtml,
// Use the current state to decide whether to enable the buttons or not
new NameValueCollection()
{
{ "enable",
Registered ? "" : "disabled" },
{ "enable-forget-access",
(Registered && hasAccessToken) ? "" : "disabled" },
{ "enable-forget-refresh",
(Registered && HasRefreshToken) ? "" : "disabled" }
}),
false);
}
context.Response.End();
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
case "/cws/register":
if (method == "GET" || method == "HEAD")
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = "OK";
context.Response.ContentType = "text/html";
// include the body for the GET request, but not HEAD
if (method == "GET")
{
string body = Registered ? File.ReadToEnd(registeredHtml, Encoding.UTF8) :
File.ReadToEnd(unregisteredHtml, Encoding.UTF8);
body = CreateHtmlBody(registerHtml,
new NameValueCollection()
{
{ "register", body }
});
if (!Registered)
{
// Make two additional variable evaluations on the "unregistered" HTML page
string scheme = context.Request.Url.Scheme;
body = body.Replace("{@callbackUrl}", CallbackUrl);
body = body.Replace("{@httpsAlert}", (scheme == "https") ? "" :
"<p>WARNING: It looks like you got here via http, not https."
+ " Check that SSL is enabled"
+ " on the control system. Don't submit anything until it is!</p>");
}
context.Response.Write(body, false);
}
context.Response.End();
}
else if (method == "POST")
{
// Get the entity-body, which should contain the domain, client_id, and client_secret
// parameters
if (context.Request.ContentType != "application/x-www-form-urlencoded")
{
SendError(context, 415, "Content-Type must be application/x-www-form-urlencoded");
return;
}
// POST requests from HTML forms put their parameters in the request body
// using the application/x-www-form-urlencoded content type. An example can be found
// at https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST
string requestBody;
// Parse the entity-body of the request and check for correctness
using (StreamReader sr = new StreamReader(context.Request.InputStream))
{
requestBody = sr.ReadToEnd();
}
NameValueCollection keyValuePairs = ParseQueryParams(requestBody);
string[] keys = keyValuePairs.AllKeys;
// Handler for the "Unregister and Return to Home Page" button
if (keys.Contains("unregister"))
{
Registered = false;
context.Response.Redirect("/cws/", true);
return;
}
// Check that all necessary registration fields (client_id, client_secret, and domain)
// have been provided
if (String.IsNullOrEmpty(keyValuePairs["domain"]) ||
String.IsNullOrEmpty(keyValuePairs["client_id"]) ||
String.IsNullOrEmpty(keyValuePairs["client_secret"]))
{
// Error, bad request
SendError(context, 400, "Registration submission is missing a necessary field");
return;
}
// Save the values provided to the datastore
Domain = keyValuePairs["domain"];
ClientID = keyValuePairs["client_id"];
ClientSecret = keyValuePairs["client_secret"];
// Send OK response
context.Response.StatusCode = 200;
context.Response.StatusDescription = statusDescriptions[200];
context.Response.Write(CreateHtmlBody(regsuccessHtml,
new NameValueCollection()
{
{ "domain", Domain },
{ "client_id", ClientID }
}), true);
// Now the client is registered with the Authorization Server
Registered = true;
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD", "POST");
}
break;
case "/cws/authorize":
if (!Registered)
{
SendError(context, 404, "The client must be registered with the Auth0 Authorization server" +
" before it can get authorized");
return;
}
if (method == "GET" || method == "HEAD")
{
// First, discard the old set of tokens
accessToken = Empty;
hasAccessToken = false;
RefreshToken = Empty;
HasRefreshToken = false;
// Generate a random state parameter, which the callback URL will check for
// consistency
stateString = Guid.NewGuid().ToString("N");
NameValueCollection queries =
new NameValueCollection()
{
// necessary scopes to get full user info and to get a Refresh Token
{ "scope", "offline_access%20openid%20email%20profile" },
// Authorization code flow
{ "response_type", "code" },
{ "client_id", ClientID },
{ "redirect_uri", CallbackUrl },
{ "state", stateString },
// Always show the login and consent pages upon redirecting
{ "prompt", "login%20consent" }
};
context.Response.StatusCode = 302;
context.Response.StatusDescription = statusDescriptions[302];
// Contruct the redirect URL and send the user to Auth0's authorization endpoint
context.Response.AppendHeader("Location", BuildAuthorizationUrl(queries));
context.Response.End();
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
case "/cws/callback":
if (method == "HEAD" || method == "GET")
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = statusDescriptions[200];
if (method == "GET")
{
// Check if there's a query string
if (context.Request.Url.Query == null ||
context.Request.Url.Query == "")
{
SendError(context, 400, "No Query parameters provided");
return;
}
NameValueCollection queryParams = null;
// Parse query string and check state
try
{
queryParams = ParseQueryParams(context.Request.Url.Query);
}
catch (Exception e)
{
SendError(context, 400, "Query string parsing error: " + e.Message);
return;
}
if (queryParams["state"] != stateString)
{
CrestronConsole.PrintLine("State parameter mismatch: expected " +
stateString + " but got " + queryParams["state"]);
SendError(context, 400, "State parameter did not match.");
return;
}
authorizationCode = queryParams["code"];
if (String.IsNullOrEmpty(authorizationCode))
{
// Authorization was denied by the user
SendError(context, 400,
"Authorization was denied. The OAuth Client has no Access or Refresh token now");
return;
}
// Using an HttpsClient, exchange the received authorization code for an Access Token
using (HttpsClient client = new HttpsClient())
{
HttpsClientRequest req = new HttpsClientRequest();
req.RequestType = Crestron.SimplSharp.Net.Https.RequestType.Post;
req.Url = new UrlParser(TokenEndpoint);
CrestronConsole.PrintLine("GETting {0}", req.Url);
HttpsHeaders headers = new HttpsHeaders();
// Auth0's token endpoint expects all the necessary information to be
// placed in the entity-body of the request
headers.SetHeaderValue("Content-Type", "application/x-www-form-urlencoded");
req.ContentString = BuildQueryString(
new NameValueCollection
{
{ "grant_type", "authorization_code" },
{ "client_id", ClientID },
{ "client_secret", ClientSecret },
{ "code", authorizationCode },
{ "redirect_uri", CallbackUrl }
});
// Always set the Content-Length of your POST request to indicate the length of the body,
// or else the Content-Length will be set to 0 by default!
headers.SetHeaderValue("Content-Length", req.ContentString.Length.ToString());
req.Header = headers;
// Send the POST request to the token endpoint and wait for a response...
HttpsClientResponse tokenResponse = client.Dispatch(req);
if (tokenResponse.Code >= 200 && tokenResponse.Code < 300)
{
// Parse JSON response and securely store the tokens
JObject resBody = JsonConvert.DeserializeObject <JObject>(tokenResponse.ContentString);
accessToken = (string)resBody["access_token"];
hasAccessToken = true;
RefreshToken = (string)resBody["refresh_token"];
HasRefreshToken = true;
CrestronConsole.PrintLine("Received \"{0}\" Access/Refresh Tokens. They expire in {1} hours",
(string)resBody["token_type"],
(int)resBody["expires_in"] / 60.0 / 60.0);
// Respond
context.Response.Write(CreateHtmlBody(authsuccessHtml, null), false);
}
else
{
SendError(context, tokenResponse.Code,
"Could not get access/refresh tokens. Token endpoint returned code " +
"<strong>" + tokenResponse.Code + "</strong>" +
"<br /><br />Error Message:<br /><br /><strong>"
+ tokenResponse.ContentString + "</strong>");
return;
}
}
}
context.Response.End();
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
case "/cws/test":
if (method == "GET" || method == "HEAD")
{
if (method == "GET")
{
if (!Registered)
{
SendError(context, 404, "The client must be registered before it can try to access" +
" a protected resource");
return;
}
// Send a GET request to the protected resource
using (HttpsClient client = new HttpsClient())
{
HttpsClientRequest req = new HttpsClientRequest();
req.RequestType = Crestron.SimplSharp.Net.Https.RequestType.Get;
req.Url = new UrlParser(ResourceEndpoint);
CrestronConsole.PrintLine("GETting {0}", req.Url);
// Put the Access Token in the Authorization header, if it's present
if (hasAccessToken)
{
req.Header.SetHeaderValue("Authorization", "Bearer " + accessToken);
}
var res = client.Dispatch(req);
if (res.Code >= 200 && res.Code < 300)
{
JObject resBody =
JsonConvert.DeserializeObject <JObject>(res.ContentString);
string name, email, picUrl;
bool verified;
// Try to get the username from any of these three JSON properties,
// if they are defined. If none of them are defined, put "undefined" as a
// placeholder name
name = (string)resBody["given_name"] ??
(string)resBody["nickname"] ??
(string)resBody["email"] ??
"undefined";
email = (string)resBody["email"] ?? "undefined";
picUrl = (string)resBody["picture"] ?? "undefined";
verified = (bool?)resBody["email_verified"] ?? false;
context.Response.Write(CreateHtmlBody(testHtml,
new NameValueCollection()
{
{ "name", name },
{ "email", email },
{ "verified", "<strong>" + (verified ? "verified" : "not verified")
+ "</strong>" },
{ "pic_url", picUrl },
}), false);
}
else
{
// If RefreshAccessToken succeeds, accessToken will contain the new token
// If not, display the body of the error response returned from the
// authorization server
string errMsg;
int errCode;
if (RefreshAccessToken(out errMsg, out errCode))
{
CrestronConsole.PrintLine("Successfully refreshed the Access Token." +
" Redirecting user to /cws/Test...");
context.Response.Redirect("/cws/Test", true);
return;
}
else
{
SendError(context, errCode,
"Failed to refresh Access Token." +
" Resource endpoint returned code <strong>" + errCode + "</strong>" +
"<br /><br />Error Message:<br /><br /><strong>" + errMsg + "</strong>");
return;
}
}
context.Response.End();
}
}
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
case "/cws/forgetaccess":
if (method == "GET" || method == "HEAD")
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = statusDescriptions[200];
if (method == "GET")
{
if (hasAccessToken)
{
accessToken = Empty;
hasAccessToken = false;
context.Response.Write(CreateHtmlBody(tokenDisposedHtml,
new NameValueCollection
{
{ "token_kind", "Access" }
}), false);
}
else
{
SendError(context, 404, "There is currently no Access Token to be disposed of");
}
}
context.Response.End();
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
case "/cws/forgetrefresh":
if (method == "GET" || method == "HEAD")
{
context.Response.StatusCode = 200;
context.Response.StatusDescription = statusDescriptions[200];
if (method == "GET")
{
if (HasRefreshToken)
{
RefreshToken = Empty;
HasRefreshToken = false;
context.Response.Write(CreateHtmlBody(tokenDisposedHtml,
new NameValueCollection
{
{ "token_kind", "Refresh" }
}), false);
}
else
{
SendError(context, 404, "There is currently no Refresh Token to be disposed of");
}
}
context.Response.End();
}
else
{
SendError(context, 405, context.Request.HttpMethod + " not allowed", "GET", "HEAD");
}
break;
default:
SendError(context, 404, path + " not found");
break;
}
}
catch (Exception e)
{
CrestronConsole.PrintLine("Error in ProcessRequest(): {0}", e);
try
{
SendError(context, 500, "An error occurred in the CWS server: " + e.Message);
CrestronConsole.PrintLine("Sent " + context.Response.StatusCode +
" response to " + context.Request.UserHostName);
}
catch (Exception ex)
{
CrestronConsole.PrintLine("Could not send Error response: {0}", ex);
}
}
finally
{
CrestronConsole.PrintLine("Sent " + context.Response.StatusCode +
" response to " + context.Request.UserHostName);
}
}
public void ProcessRequest(HttpCwsContext context)
{
var method = context.Request.HttpMethod;
switch (method)
{
case "GET":
context.Response.StatusCode = 200; // OK
context.Response.ContentType = "application/json";
if (context.Request.RouteData.Values.ContainsKey("PROPERTY"))
{
var prop = context.Request.RouteData.Values["PROPERTY"];
context.Response.Write(GetPropertyJSON(prop.ToString()), true);
}
else
{
try
{
context.Response.Write(JsonConvert.SerializeObject(_settings), true);
}
catch (Exception e)
{
ErrorLog.Error("Exception in RoomRequest.ProcessRequest: {0}",
e.Message);
}
}
break;
case "PUT":
context.Response.StatusCode = 200; // OK
context.Response.ContentType = "application/json";
SystemSettings newSettings;
try
{
using (var reader = new StreamReader(context.Request.InputStream))
{
newSettings = JsonConvert.DeserializeObject <SystemSettings>
(reader.ReadToEnd());
CrestronConsole.PrintLine("Inputs: {0}", newSettings.inputs.Length);
CrestronConsole.PrintLine("Outputs: {0}", newSettings.outputs.Length);
}
_settings.Copy(newSettings);
}
catch (Exception e)
{
ErrorLog.Error("Exception in RoomRequest.ProcessRequest: {0}",
e.Message);
}
context.Response.Write("{ \"status\": \"OK\" }", true);
break;
default:
context.Response.StatusCode = 501; // Not implemented
context.Response.Write(
String.Format("{0} method not implemented!", method),
true);
break;
}
}
protected RestfulRelayServer server; // reference to the server, the handler's "parent" public abstract void ProcessRequest(HttpCwsContext context);